Baby sickness bug and breastfeeding

The rest of the family has had a sickness bug and i think my 3 month old has it as she is unsettled and sicky. She is asking to feed almost constantly which i have been doing but she is then sick after the feed.Should i feed whenever she asks? Do i need to give her extra water if she is being sick?she has no temp or anything and so far this has been going on less than 24 hours..Any advice appreciated!